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1.24 Gbps Switching Memory
The IDT77V400 Switching Memory provides the cell buffer memory and port interface
functionality needed for network switch designs. Its companion controller, the
IDT77V500 manages network traffic flow through the Switching Memory and enables
the quality of service made possible by ATM.
IDT's IDT77V400/500 switching solution delivers 1.24 Gbps performance with high
levels of integrated functionality. Utilizing IDT's own Fusion technique, which multiplies
the amount of memory integrated on a single chip, the IDT77V400 Switch Memory
combines the high speed of SRAM with the economy of a DRAM core. By integrating an
8K cell buffer and eliminating the need for external memory, the IDT77V400 keeps system
costs low and offers dramatic board space savings compared to typical switch chip sets.
The IDT77V500 Switch Controller further reduces chip count and system cost with the
ability to manage more than 8,000 virtual connections without external memory.
The IDT77V400's innovative data path interface (DPI) gives designers the flexibility to
independently configure input and output ports for their own individual switching
applications, from eight ports at 155 Mbps to one port at 1.24 Gbps. The use of
multiple IDT77V400/500 sets provides an architecture that can be expanded to
create larger switching structures, such as increased buffer size or larger port
The IDT77V400 Switching Memory has the ability to process cells as large as
56 bytes in length, offering system designers the additional bytes per cell to
optimize flow through the network. System traffic performance can also be
enhanced using features offered by the IDT77V500 Switch Controller, including per
VC queuing for scheduling fairness, CBR, VBR, UBR and ABR (EFCI) service class
support, and multiple congestion management options.
|PQFP 208 Pin
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